CD/DVD ROM icon missing

i m using Compaq presario 1800T ,pentium II , designe for win98.
but i m using WINXPpro sp2 version 2002. since last 2years.
i have DVD/CD rom,
form last 2 weeks i have seen that my laptop READS a CD but cant dispaly any data.
my CDrom icon , E: is missing suddenly.i have no access to my CD rom.
in device manager i can see IDE ATA/ATAPI contollers, with NO exclmatory mark.i cannt find my CD/DVD ROM drivers
it is detected by BIOS but fail to detect in windows.
i tried deleting Upper n Lower filter,but no joy.{http://support.microsoft.com/kb/314060/EN-US/}

i think you should uninstall and re-install your device drivers and see if that works. if that doesnt, then try running chkdsk /r in cmd prompt and see if it will fix it.. OR if that doesnt work, you can run a windows xp repair without damaging your files. if you dont know how to run it, just let me know. If you run that and it doesnt work, then your DVD/CD ROM is defective, or just needs to be cleaned thouroughly because its dirty..

i cannt find my device driver. it say that the driver are auto.loaded form Win 98or XP.
how to run the repair for win,since i cannt run a CD.
there is no question of defective device,coz....rom reads a CD.
the basic problem is that , i cannt locate my rom in Mycomputer.
i GUESS, i have DVDRom of TOHSIBA DVDROM SD-2202
thanx for ur reply.appreciate.